PSL 1 vs. PSL 2 Spec Sheet
| PSL 1 | PSL 2 | ||
|---|---|---|---|
| Grade range | A25 through X70 | GR B through X80 | Table 1 |
| Size range | 0.405 through 80 | 4-2/1 through 80 | Table 1 |
| Type of pipe ends | Plain-end, threaded-end, bevelled-end, special coupling pipe | Plain-end | Table 1 |
| Seam welding | All methods continous welding limited to Grade A25 | All methods except continous and laser welding | Table 1 |
| Electric welds: welder frequency | No minimum | 100 kHz minimum | 5.1.3.3.2 |
| Heat treatments of electric welds | Required for grades > X42 | Required for all grades (GR B through X80) | 5.1.3.3.1; J.3.3.2:6.2.7 |
| Chemistry: max C for seamless pipe | 0.28% for grades > Gr B | 0.24% | Tables 2A, 2B |
| Chemistry: max C for welded pipe | 0.26% for grades > Gr B | 0.22% | Tables 2A, 2B |
| Chemistry: max P | 0.03% | 0.03% | Tables 2A, 2B |
| Chemistry: max S | Only when purchases specifies SR18 | 0.02% | Tables 2A, 2B |
| Carbon equivalent | None | Maximum required for each grade | 4.2:4.3:6.1.3: SR15.1 |
| Yield strength, maximum | None | Maximum for each grade | Tables 3A, 3B |
| UTS, maximum | None required | Maximum for each grade | Tables 3A, 3B |
| Fracture toughness | Only when purchaser specifies SR4 | Required for all grades | 6.2.6; 9.3.5: 9.8.4; 9.10.7; |
| Non-destructive inspection of seamless pipes | Permitted | SR4 mandatory | Table 14 9.7.2.6 |
| Repare by welding of pipe body, plate and skelp | Permitted by agreement | Prohibited | 5.3.2;9.7.6: B.1;B.2 |
| Certification | Certificates when specified per SR15 | Prohibited | 4.3;9.7.4.4;9.7.6;B.1.2;B.4 |
| Traceability | Traceable only until all tests are passed unless SR15 is specified | Certificates (SR15.1) mandatory Traceable after completion of tests (SR15.2) mandatory |
12.1 5.6 |
Notes:
*PSL1 & PSL2 requirements are given in the latest edition of API 5L specifications